BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:0 UID:UW-Physics-Event-4507 DTSTART:20170303T213000Z DURATION:PT1H0M0S DTSTAMP:20260419T042701Z LAST-MODIFIED:20170228T144309Z LOCATION:2241 Chamberlin hall SUMMARY:Quantum measurement in superconducting circuits: mapping quant um trajectories from spontaneous emission.\, Physics Department Colloq uium\, Kater Murch\, Washington University\, St. Louis DESCRIPTION:Spontaneous emission of light by atoms is one of the most basic light-matter interactions and is responsible for the majority of the visible light that we see. The process of spontaneous emission c an also be viewed in the context of quantum measurement\, the light-ma tter interaction entangles the atom with the electromagnetic field and subsequent measurements of the field convey information about the sta te of the atom. For example\, if the emitted light is detected in the form of energy quanta\, the detection of an individual photon results in an instantaneous jump of the atom to a lower energy state. Howeve r\, if the emission is instead measured with a detector that is not se nsitive to quanta\, but rather the amplitude of the field\, the atom†™s state will undergo different dynamics over finite timescales.
\ nIn this talk\, I will review how recent progress in the fabrication a nd control of quantum coherent superconducting circuits has enabled ex periments that probe the fundamental physics of quantum measurement. T hese range from the observation of non-classical weak values to the ge neration of entanglement through measurement and the tracking of indiv idual quantum trajectories. I will then describe our recent experimen ts that focus on the special case of spontaneous emission\, revealing rich dynamics associated with measurement\, and how we are harnessing these dynamics to extend thermodynamics into the regime of single quan tum systems. URL:https://www.physics.wisc.edu/events/?id=4507 END:VEVENT END:VCALENDAR